70101417
2018-12
21
Universal Transmitter Power Supply KF**-CRG2-(Ex)1.D
Editing Device Data: Input
Example 3: selected unit bar, -4 bar to 4 bar is to correspond to 4 mA to 20 mA
• Linearization
y = m x + n
• Conversion factor = rise in the graph
m = (y2 – y1) / (x2 – x1)
m = (4 - 0) / (20 – 12) = 0.5
• Zero point = intersection point with the x-axis on the graph (bar value at y = 0)
n = y – m x
n = 4 – 0.5 x 20 = -6
y = m x + n
x = (y – n) / m
x = (0 + 6) / 0.5 = 1
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x [mA]
-1
1
2
3
4
-4
-3
-2
-1
-2
-3
-4
11 12 13 14 15 16 17 18 19 20
y [bar]
